Valve



etant Dec. 3, -1929 NITED JESSE D. `LANGDON, OF LOS ANGLES, INGCORPORATION,

t 3am rArEn or CALIFORNIA, ASSIGI'NOR TO LANGDON ENGINEER- OFLOSANGELES, CALIFORNIA- VVE Application led December 15, 192?. Serial No..'$40,297.

The present invention relates .to valves, and alms to provide Ia novelvalve construction which is simple and practical and which comprises anovel assembly of the component t elements.

Another objectis the provision of a valveY having a novel cooperablevalve member or head and seat, which provide a tight lit and which havea scraping action to keep ther l llith the foregoing and other objects`iu view, which will be apparent as the descrip-` tion proceeds, theinvention resides in the construction and arrangement of parts, as

hereinafter described and claimed, it being the scope of what isclaimed, without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein the*figure is a median section of the valve, .the stem being shown-inelevation. V

The valve casing or body 1 may be of any suitable size and shape, and isprovided with an opening 2 at one end and with an fopening 3 at rightangles with theA opening 2. The opening 3 is screw-threaded to receive anipple or tubularmember 4:.which provides the other opening for thecasing', as well as a valve seat. A lock nut 5 is preferably threaded onthe nipple 4 to bear against the casi ng 1,

The casing has a boss 6 outstanding therefrom opposite to the opening 3andi nipple 4, and the valve stem 7 is screw threaded through 'saidboss. The inner terminal 8 of the stem is reduced in diameter andscrew-threaded reversely, and the valve member or head 9 is threaded onthe terminal 8. The valve member has a conical surface l() to rseatagainst the inner edge of the nipple 4, and' the'inner n end of saidnipple is bevellcd, as at 11, to

present a sharp edge to scrape the tapered wsurface 10 of the Valvemember, said edge projecting in a direction opposite to the direction ofsea-ting movement of the valve member so 5@ as to be presented at anacute angle vto the 4understood that changes can be made withinl conicalor tapered surface of the valve mem` ber. The valve. member, whenseated, wedges into the inner end of the nipple or valve seat, toprovide a tight fit, and during the rotary seating movement of the valvemember the edge 11 `scrapes. the surface 10 yto keep same clean. l

y The stem 7 has a handle 12 or other suitable means at its outer endfor rotating the stem, and the screw-thread of the terminal 8 beingreverse to the main screw thread of the stem will prevent the valvemember 9 from accidentally unscrewing from theiterminal 8,

Witholtusing other securing means. It is therefore unnecessary to fastenthe valve member on the stem excepting to screw said member on theterminal 8.

A socket nut 13 is threaded on the boss 16 to, provide a packing gland,and contains packing 14 that embraces the stem 7 to engage thescrew-threads of said stem. rlhc packing is forced into the groove ofthe screvvj thread, when the nut or gland 13 is tightened,

and the packing will withstand high pressure of fluid within the valvecasing, Without the necessity for the nut 13 being abnormally tight,inasmuch as the pressure of the fluid against the packing will tightenthe packmg against the threads of the stem.

The valve member or head and seat are both of metal, so as to provide ametal to metal contact. The assembly is simple; and when the casing 1and nipple 4- are separated, the

valve member 9 may be readily unscrewed from the stem 7, and the stemthen unscrewed from .the casing.

Having thus described the invention, what is claimed as new is A A gvalve comprising a casing, a nipple screw-threaded therein and havingits inner end bevelled to form a sharp edge, a stem screw-threadedwithin the casing opposite to said nipple, and a valve member on saidstem having a conical surface to seat within said edge with a scrapingaction, said edge pro jecting in a direction opposite to the directionof seating movement of said valve member. In testimony whereof Ihereunto aiiix my signature.

JESS-E D. LANGDON.

